...;::::.::' I r=:: ( ::: ::=:.: /: W r ' .: ' 1:i* ' '.. ......... . . " . .,. ,. ;.. .'t':. /' :.-::..... .. .:::; ; ,j t. : ,..... I !:. ir# ":'} "WU4 .w....... .... Bee-lines to Berlin A straight line-really straight-is one of the hardest things in the world to draw . Yet thousands of mathematically straight lines are necessary to the build- ing of a big airplane like the Boeing Fly- ing Fortress and the B-29 Superfortress. The master layout drawings for every part of a bomber must be made on Hat sheets of lacquered steel. To insure the accuracy of the finished dra'wing, the metal is first scribed with intersecting reference lines like those on a gigantic sheet of graph paper. And the lines must cross each other in perfect 10 - inch squares, without deviating as much as II I ooth of an inch. ",i:' .;:: -:. ::::.:: ::: '.:- :.':: ::J . ; ";:. ... '.. ....:.... ... . 9 '.;." ". i 1Jk:: , .... @:*=<:<:, ':;;'" .i::: '.:. . ... . :-:," . ": .... .'i' "'l tIr: %'þ'i "St-...... ....:. "" . .:At' >>: j Until recently this was a slow and laborious job. Draftsmen sprawled across the big tables hour aftèr hour, ruling in reference lines with straight-edges. But the slightest miscalculation - even the expansion of metal caused by the sun's heat - might ruin their efforts. Drawing the grid lines on master layouts for the frames and bulkheads of one model alone consumed 5600 hours. Boeing engineers determined to change the method. They built the "Grid Machine" shown above-a simple, supremely accurate devIce that draws a dozen parallel straight lines while you watch. It never makes a mistake. And 'AW : . Buy War Bonds - to Have and to Hold it has already saved thousands of price- less hours between blueprint and bomb- ing mission. Today the work is done in less than a tenth of the fonner time. All through the Boeing plants are sim- ilar examples of ingenuity and skill applied to the task of building more airplanes faster and more economically - speeding the production that shortens the distance to Victory. When the war is won, Boeing's abilities in design, engineering and manufactur- ing will again be applied to peacetime products. You can be sure of any such product . . . if it's "Built by Boeing" it's bound to be good. B I:ING DESIGNERS OF THE FLYING FORTRESS . THE NEW 8-29 SUPER FORTRESS . THE STRATOLINER . TRANSOCEAN CLIPPERS